Zhao Hui, Dai Xuewu, Zhao Yuan
School of Artificial Intelligence, Shenyang University of Technology, Shenyang, 110870, China.
Department of Mathematics, Physics and Electrical Engineering, Northumbria University, NE1 8ST Newcastle upon Tyne, UK.
Heliyon. 2024 Aug 26;10(17):e36755. doi: 10.1016/j.heliyon.2024.e36755. eCollection 2024 Sep 15.
The clock synchronization is a key technology for the reliability of wireless sensor networks (WSN). To reduce the communication burden and address the challenge of clock synchronization for high-precise clock systems in WSN with switching topologies, this paper proposes an event-triggered synchronization strategy for high-precise clock systems. Firstly, based on the concept of offset and skew, the model of whole clock systems is investigated and an event-triggered strategy is proposed for high-precise clock systems with switching topologies. Then, a synchronization strategy for clock systems is presented to achieve clock synchronization with the convergence of clock offset and clock skew. The sufficient condition for the synchronization of high-precise clock systems with switching topologies is obtained. Afterwards, the optimal event-triggered weighting matrices and controller gains are calculated by converting the clock synchronization problem as a solvable optimization problem. Finally, the performance of the proposed clock synchronization method is evaluated by simulations.
时钟同步是无线传感器网络（WSN）可靠性的关键技术。为了减轻通信负担并应对具有切换拓扑的无线传感器网络中高精度时钟系统的时钟同步挑战，本文提出了一种针对高精度时钟系统的事件触发同步策略。首先，基于偏移和偏差的概念，研究了整个时钟系统的模型，并针对具有切换拓扑的高精度时钟系统提出了一种事件触发策略。然后，提出了一种时钟系统同步策略，以实现时钟偏移和时钟偏差收敛的时钟同步。得到了具有切换拓扑的高精度时钟系统同步的充分条件。之后，通过将时钟同步问题转化为可解的优化问题来计算最优事件触发加权矩阵和控制器增益。最后，通过仿真评估了所提出的时钟同步方法的性能。
